(*****************************************************************************) (* *) (* TUT9.PAS - VGA Trainer Program 10 (in Pascal) *) (* *) (* "The VGA Trainer Program" was originally written by Denthor of *) (* Asphyxia. It contained some nice pascal source and documentation. *) (* But then Snowman came along. He saw disorder, he saw inefficiency, *) (* he saw PASCAL. Denthor couldn't stop Snowman, so Snowman went on to *) (* convert tha pascal source to C++. ...and the people were happy. *) (* *) (* Program Notes : This program presents Chain-4. *) (* *) (* Author : Grant Smith (Denthor) - denthor@beastie.cs.und.ac.za *) (* *) (*****************************************************************************) Uses Crt,GFX; Const Size : Byte = 80; { Size = 40 = 1 across, 4 down } { Size = 80 = 2 across, 2 down } { Size = 160 = 4 across, 1 down } bit : Array [1..897] of byte = ( 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,33,2,151,5,149,6,148,7,147,8,49,2,95,8,49, 4,93,9,49,3,93,4,2,3,49,4,92,4,3,3,48,4,92,4,3,4,48,4,91,4,4,3,48,4,92,4,3,4, 48,3,58,2,32,4,4,4,47,4,57,3,31,4,5,3,48,3,57,4,30,4,5,4,47,3,57,5,29,4,6,4,46, 4,57,4,29,4,7,3,47,3,58,2,30,4,7,4,46,4,90,4,7,4,46,3,90,4,8,4,27,2,16,3,90,4, 8,9,22,3,16,3,89,4,5,13,8,6,8,3,15,3,90,4,2,15,6,10,6,3,16,3,6,1,21,1,9,2,7,1, 21,6,14,18,9,5,2,4,5,4,1,4,10,3,4,5,10,2,7,3,8,2,5,3,9,3,7,8,13,13,1,4,9,4,5,3, 5,3,1,6,9,3,3,6,9,4,5,4,8,3,3,4,9,3,6,9,11,10,6,4,8,4,6,3,4,11,8,3,2,7,9,5,4,4, 9,3,2,4,9,3,6,4,4,2,8,10,9,4,7,4,6,3,5,5,3,3,8,3,1,8,8,5,4,5,8,3,3,3,9,4,5,4,5, 2,5,10,12,4,7,3,5,5,4,5,4,3,7,3,1,4,1,3,9,4,5,4,9,3,2,3,10,3,6,3,5,3,4,10,13,3, 8,3,2,7,5,4,5,3,7,7,1,3,9,4,5,5,9,3,1,3,10,3,6,3,5,4,4,5,1,4,12,4,8,3,2,5,6,4, 5,4,6,6,2,4,8,4,5,5,10,6,10,4,5,4,5,3,5,2,3,4,13,4,8,3,3,1,9,3,6,3,7,5,3,3,5,1, 3,3,5,5,4,2,5,5,11,3,6,3,5,4,10,3,14,4,8,3,12,3,6,4,6,5,3,3,5,2,2,4,4,6,4,2,5, 5,6,1,3,4,5,3,6,3,10,4,14,4,5,1,2,4,11,3,6,3,7,5,3,3,4,3,1,4,4,6,4,3,5,4,6,2,3, 3,6,3,5,4,9,4,15,3,5,2,3,4,9,3,6,4,7,4,3,3,5,2,2,3,4,7,3,3,6,3,6,3,2,4,5,4,5,3, 10,3,15,4,4,3,4,3,9,3,6,3,7,4,4,3,4,3,1,4,3,3,1,3,3,3,6,4,6,2,3,3,6,3,5,4,9,4, 15,4,4,3,4,4,7,3,6,4,7,4,3,3,4,3,2,3,3,3,2,3,2,4,5,5,5,3,2,4,6,3,5,4,8,4,16,4, 4,2,6,3,7,3,5,4,7,4,4,3,3,3,3,8,2,3,2,4,5,6,4,3,3,3,7,3,4,5,8,4,16,4,4,2,6,3,6, 3,5,4,8,3,5,8,3,9,2,3,1,4,6,6,3,3,4,3,7,3,3,6,7,4,17,4,4,3,5,3,6,3,4,4,9,3,5,8, 3,7,3,8,6,3,1,4,1,4,3,4,7,3,2,3,1,3,7,4,17,4,4,3,5,3,5,11,9,3,6,7,4,6,4,7,6,3, 2,8,4,3,8,7,2,3,6,4,18,3,5,4,3,4,5,10,10,3,6,6,6,4,4,6,7,3,4,6,5,3,8,7,2,4,4,4, 19,3,5,10,5,3,1,6,11,3,7,3,16,5,7,4,4,5,6,3,8,6,3,5,3,4,19,3,6,9,5,3,18,2,25,5, 9,3,6,3,7,2,10,3,6,4,3,3,20,3,8,5,6,3,44,6,10,2,39,3,3,2,22,2,19,3,43,7,101,3, 42,8,102,3,41,4,1,4,101,4,39,5,2,3,102,3,39,4,4,3,102,3,38,4,4,4,101,3,38,4,5, 3,102,3,37,4,5,4,101,4,36,4,6,3,102,3,37,3,6,4,102,3,36,4,6,3,102,3,37,3,6,3, 103,3,37,3,5,4,102,4,37,3,4,4,103,3,38,10,104,3,38,9,105,2,40,7,106,2,41,4,0); {ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ} Procedure InitChain4; ASSEMBLER; { This procedure gets you into Chain 4 mode } Asm mov ax, 13h int 10h { Get into MCGA Mode } mov dx, 3c4h { Port 3c4h = Sequencer Address Register } mov al, 4 { Index 4 = memory mode } out dx, al inc dx { Port 3c5h ... here we set the mem mode } in al, dx and al, not 08h or al, 04h out dx, al mov dx, 3ceh mov al, 5 out dx, al inc dx in al, dx and al, not 10h out dx, al dec dx mov al, 6 out dx, al inc dx in al, dx and al, not 02h out dx, al mov dx, 3c4h mov ax, (0fh shl 8) + 2 out dx, ax mov ax, 0a000h mov es, ax sub di, di mov ax, 0000h { 8080h } mov cx, 32768 cld rep stosw { Clear garbage off the screen ... } mov dx, 3d4h mov al, 14h out dx, al inc dx in al, dx and al, not 40h out dx, al dec dx mov al, 17h out dx, al inc dx in al, dx or al, 40h out dx, al mov dx, 3d4h mov al, 13h out dx, al inc dx mov al, [Size] { Size * 8 = Pixels across. Only 320 are visible} out dx, al End; {ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ} Procedure C4PutPixel(X,Y : Word; Col : Byte); ASSEMBLER; { This puts a pixel on the chain 4 screen } Asm mov ax,[y] xor bx,bx mov bl,[size] imul bx shl ax,1 mov bx,ax mov ax, [X] mov cx, ax shr ax, 2 add bx, ax and cx, 00000011b mov ah, 1 shl ah, cl mov dx, 3c4h { Sequencer Register } mov al, 2 { Map Mask Index } out dx, ax mov ax, 0a000h mov es, ax mov al, [col] mov es: [bx], al End; {ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ} Procedure Plane(Which : Byte); ASSEMBLER; { This sets the plane to write to in Chain 4} Asm mov al, 2h mov ah, 1 mov cl, [Which] shl ah, cl mov dx, 3c4h { Sequencer Register } out dx, ax End; {ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ} procedure moveto(x, y : word); { This moves to position x*4,y on a chain 4 screen } var o : word; begin o := y*size*2+x; asm mov bx, [o] mov ah, bh mov al, 0ch mov dx, 3d4h out dx, ax mov ah, bl mov al, 0dh mov dx, 3d4h out dx, ax end; end; {ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ} Procedure Putpic (x,y:integer); { This put's the picture at coordinates x,y on the chain-4 screen } Var loop1,loop2:integer; depth,cur:integer; BEGIN depth:=1; cur:=0; For loop1:=1 to 897 do BEGIN for loop2:=1 to bit [loop1] do BEGIN if cur<>0 then c4putpixel ((depth mod 155)+x,(depth div 155)+y,depth div 155); inc (depth); END; cur:=(cur+1) mod 2; END; END; Procedure Play; Var loop1,loop2:integer; xpos,ypos,xdir,ydir:integer; ch:char; Begin for loop1:=1 to 62 do pal (loop1,loop1,0,62-loop1); { This sets up the pallette for the pic } MoveTo(0,0); { This moves the view to the top left hand corner } for loop1:=0 to 3 do for loop2:=0 to 5 do putpic (loop1*160,loop2*66); { This places the picture all over the chain-4 screen } readkey; ch:=#0; xpos:=random (78)+1; ypos:=random (198)+1; { Random start positions for the view } xdir:=1; ydir:=1; repeat moveto (xpos,ypos); waitretrace; { Take this out and watch the screen go crazy! } xpos:=xpos+xdir; ypos:=ypos+ydir; if (xpos>79) or (xpos<1) then xdir:=-xdir; if (ypos>199) or (ypos<1) then ydir:=-ydir; { Hit a boundry, change direction! } if keypressed then ch:=readkey; until ch=#27; { Quit when escape is pressed } End; BEGIN clrscr; writeln ('Hello there! Here is the tenth tutorial, on Chain-4! You will notice'); writeln ('that there are two pascal files here : one is a unit containing all'); writeln ('our base graphics routines, and one is the demo program.'); writeln; writeln ('In the demo program, we will do the necessary port stuff to get into'); writeln ('Chain-4. Once in Chain-4 mode, I will put down text saying ASPHYXIA'); writeln ('over the entire screen. After a key is pressed, the viewport will'); writeln ('bounce around, displaying the entire Chain-4 screen. The program will'); writeln ('end when [ESC] is pressed. The code here is really basic (except for'); writeln ('those port values), and should be very easy to understand.'); writeln; writeln; Write (' Hit any key to contine ...'); Readkey; initChain4; play; SetText; Writeln ('All done. This concludes the tenth sample program in the ASPHYXIA'); Writeln ('Training series. You may reach DENTHOR under the names of GRANT'); Writeln ('SMITH/DENTHOR/ASPHYXIA on the ASPHYXIA BBS. I am also an avid'); Writeln ('Connectix BBS user, and occasionally read RSAProg. E-mail me at :'); Writeln (' smith9@batis.bis.und.ac.za'); Writeln ('The numbers are available in the main text. You may also write to me at:'); Writeln (' Grant Smith'); Writeln (' P.O. Box 270'); Writeln (' Kloof'); Writeln (' 3640'); Writeln (' Natal'); Writeln (' South Africa'); Writeln ('I hope to hear from you soon!'); Writeln; Writeln; Write ('Hit any key to exit ...'); Readkey; END.